Reaming-tool.



E. C. MEIER.

REAMING TOOL.

APPLICATION FILED MAR. 29. 1915.

Patented Nov. 2, 1915.

2 SHEETS-SHEET I.

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E. C. MEIER.

REAMING TOOL.

APPLICATION FILED MAR. 29.19l5.

Patented Nov. 2, 1915.

2 SHEETSSHEET 2.

EDWARD C. MEIER, OF PHOENIXVILLE, PENNSYLV REAMING-TOOL.

Application filed March 29, 1915. Serial No. 17,768.

fication.

My invention relates to improvements in reamers, and more particularly to an im: proved multiple drilling and reaming tool, the object of the invention being to provide a tool of the character stated which will simultaneously drill and ream two holes in proximity to each other, and which is especially designed for use in the formation of hand hole plates in the water legs of boilers.

A further object is to provide an improved construction of tool in which parallel drill spindles are driven by a pinion which imparts motion to two idlers, and the latter in mesh with gears on both drill spindles, whereby the centers of the drill spindles can be located relatively close to each other, and a maximum of power utilized in the driving operation.

With theseand other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings: Figure 1 is a view in longitudinal section illustrating my improved tool. Fig. 2 is a plan view of the drill with the upper half of the tool casing removed. Fig. 3 is a fragmentary view in longitudinal section at right angles to Fig. 1, the View being taken on the line 33 of Fig. 1, and Fig. 4 is a fragmentary view on a reduced scale illustrating the hand hole sheet of a boiler water leg to illustrate one use to which the tool may be put.

1 represents the drill casing which is formed of two separable members 2 and 3 secured together by bolts 4 and nuts 5.

The lower member 3 of casing 1 sup orts parallel drill spindles 6, which turn in ushings 7, and are provided with bearin s 8 in Specification of Letters Patent.

Patented Nov. 2, 1915.

between the same and the journal pins 9 to sustain the thrust of the tool.

The spindles 6 are provided with sockets 11 in thelr lower ends to receive drills 12,

and while my invention is not limited to any 4 particular construction of cutting tool, I

preferably employ a combined drill and reamer so that the hole which is made is reamed in the operation of drilling.

Between the spindles 6, a pin 13 is located and is provided with a screw-threaded upper end 14 engaging in a threaded socket 15 in the lower member 3 of drill socket 1, and is provided with an annular flange 16 to bear against the lower face of the casing. This pin 13 is longer than the drills 12, and operates to properly position the drills as will be hereinafter explained.

The upper member 2 of casing 1 is provided with a central opening 17 in which a bushing 18 is located, and a drive shaft 19 is mounted in the bushing and at its lower end has'keyed thereto a driving pinion 20.

A washer 21 is preferably interposed 'between the pinion'20 and the lower end of the bushing 18, and on this washer the casing is supported when idle, but when in operation, the-downward pressure on the drive shaft 19 spaces the pinion 20 from bushing 18, so that there is a minimum of friction in the driving operation.

A shank 22 is secured by a screw 23 to the drive shaft 19, and is spaced from the upper end of the casing by ball bearings 24. The drive pinion 20 is located centrally in the casing, and meshes with two relatively long idle gears 24, the journals 25 of which are mounted in bearings 26 in the upper and lower members 2 and 3 respectively of cas-' ing 1.

The idle gears 24, at their lower portions, mesh with gear wheels 28, which latter are keyed to the upper. ends of the drill spindles 6, and as shown clearly in the plan view, Fig. 2, the idle gears 24 mesh with both of the gears 28, and hence a firm, compact, strong and rigid power transmission is had to drive the spindles in the same direction and permit their. location to be relatively close to one another.

While, of course, my invention is not limited to any particular manner of lubricatthe three holes 30, 31, and 32 in the plate 33.

These holes are in alinement, and the holes 30 and 32 are appreciably larger than the central hole 31. My improved drill above described is then used, and in operation the pin 13 is located in the hole 31, and the tool turned until the reamers 12 are in the holes 30 and 32. The'tool is then operated. The turning of shaft 19, through the medium of pinion 20, gears 24, and gears 28, impart rotary motion to the spindle 6, so that the holes 30 and 32 are reamed to a diameter indicated by the dotted lines 34:. The tool is then removed, and another reamer usedto cut an opening indicated by the dotted lines 35, to complete the hand hole in the boiler plate.

While my invention is of course, not limited to any particular means for driving the tool, it may be connected with a source of power to turn the same, and when the drill is not in use, the casing will turn idly with the shank 22, but as soon as the turning movement of the casing is stopped by placing the hand thereupon, the spindles 6 will begin to revolve, and the tool perform its normal operation.

While I have illustrated the tools 12 as reamers, I would have it understood that my invention broadly covers any cutting tool, and hence in the claims where I shall hereinafter use the word drill, I would have it understood that I use the same in its broad est sense.

Various slight changes might be made in the general form and arrangement of parts described without departing from my invention as defined by the scope of the claims, and hence I do not limit myself to the precise details set forth, but consider myself at liberty to make such changes and alterations as fairly. fall within the spirit and scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The combination with a support, of a pair of drill spindles located relatlvely close to one another, and a guide pin longer than the spindles and located between the spindles, substantially as described.-

2. The combination with a casing, of parallel drill spindles mounted to turn in the easing, and a guide pin longer than the splndles and secured in the casing and located between the spindles, substantially as. described.

, 3. The combination with a casing, of parallel drill spindles mounted to turn in the casing, and a guide pin secured in the casing and located between the spindles, Said guide pin projecting below the ends of the tools carr ed by the spindles, substantially as described.

4. The combination with a casing, of parallel drill spindles mounted to turn in the casing, a guide pin longer than the spindles and secured in the casing and located between the spindles, and means for simultaneously turning the spindles in the same di-' rection, substantially as described.

5. Thecombination with a two part cas-' ing, of parallel drill spindles mounted to turn in one part of the casing, a guide pin longer than the spindles and secured to the casing between the spindles, a 'drive shaft mounted to turn in the other part of the casing, and gearing between the two parts .of the casing connecting the drive shaft and the spindles, substantially as described.

6. The combination with a casing, parallel drill spindles in the casing, a guide pin longer than the spindles and secured to the casing between the spindles, a drive. shaft in the casing, gears secured to turn with the spindles, a pinion secured to the drive shaft, and idle gears meshing with both spindle gears and also with the pinion, substantially as described.

7. The combination with a two part casing, of parallel drill spindles mounted to turn I in one part of the casing, a drive shaft mounted to turn in the other part of the casing, and gearing between the two parts of the casing connecting the drive shaft and the spindles, and a guide pin located centrally between the spindles secured to the 11 casing and projecting below the tool sup ported by the spindles, substantially as described.

8. The combination with a casing, parallel drill spindles in the casing, a drive shaft in the casing, gears secured to turn with the spindles, a pinion secured to the drive shaft, idle, gears meshing with bothspindles gears and also with the pinion, and a guide I pin located centrally between the spindles secured to the casing and projecting below the tool supported by the spindles, substantially as described.

9. The combination with a casing, of parallel spindles supported in the casing, gear 25 wheels secured to the spindlesinthe casing, a drive shaft projecting into the casing, a

' pinion on the drive shaft located in a plane above the spindle gears, and idle gears at opposite sides of the pinion meshing with the pinion and with both of the spindle necting the pinion with the spindle gears,- gears, substantially as described. and a shank secured to the outer end of the 10. The combination with a two part casdrive shaft and having rotary mounting on 15 ing, devices securing the two parts of the the casing, substantially as described.

5 casing together, journal pins secured in one In testimony whereof I have signed my part of the casing; drill spindles mounted name tothis specification in the presence of to turn in the other part of the casing and two subscribing witnesses. having bearings in their ends receiving the journal pins, gears secured on the spindles EDWARD MEIER -1 in the casing, a drive shaft extending Witnesses: 7

through one part of the casing, a pinion on S, W. FOSTER,

the drive shaft in the casing, idle gears con- M. EDWIN J. HEILMAN. 

